Anna is pushing her brother on a swing. Anna pushes her brother again in the same direction that he is moving. What will happen to her brother? A. He will swing faster and higher. B. He will start swinging in the opposite direction. C. He will slow down and then speed up. D. He will stop swinging.

7Which of the following statements is true about an object? A. If the object is moving, it will keep moving until acted on by a force. B. If the object is moving in a straight line, eventually it will change direction on its own. C. If the object is not moving, eventually it will start moving on its own. D. If the object is moving, eventually it will stop moving on its own.

Tom is teaching Jenny how to ice skate. Both skaters, who are about the same size, are on the ice and wearing their skates. To help Jenny get started, Tom gives her a gentle push from behind. Which of the following best describes what will happen next? A. Jenny will not move, and Tom will move backward. B. Jenny will move backward, and Tom will move forward. C. Jenny will move forward, and Tom will not move. D. Jenny will move forward, and Tom will move backward.

Claire is skating across a frozen pond.Which of these would cause Claire's energy of motion to increase? A. changing her direction B. decreasing her speed C. removing her skates D. increasing her speed

6Tina and Jill have two balls, ball A and ball B. Ball A is twice as heavy as ball B. Tina and Jill push the balls with the same strength across the same flat surface.What will happen to the balls? A. Ball A will roll faster. B. Neither ball will roll at all. C. Ball A and ball B will roll at the same speed. D. Ball B will roll faster.

Maria pushes a ball, and the ball rolls across the table. She wants to make the ball roll faster.Maria needs to push the ball A. on a different table. B. with less strength. C. on the other side of the table. D. with more strength.